Mercedes star Lewis Hamilton is aware he can still be caught in the battle for the World Championship despite opening up a 28-point lead at the weekend.

The British star took maximum points in Singapore on Sunday as nearest rival Sebastian Vettel of Ferrari crashed out in the opening lap.

Hamilton is now well placed to claim a fourth championship but, with seven races remaining, he knows he still has plenty to do to land the top prize.

The next race takes place in Malaysia at the end of the month but Hamilton feels Japan, Brazil and Mexico could be the locations where Mercedes drop points.

“Coming up we have Japan where you need a lot of downforce, so that definitely won’t be our strongest circuit,” he told Germany’s Bild.

“In Brazil the others will be strong as well and in Mexico the teams with the most downforce could have the upper hand.

“Honestly I think it’s going to be very close. It’s hard to predict. We’ll find out when we get there.”

Hamilton is 1.15 to win the 2017 World Championship outright and Vettel is 5.25.

Hamilton is 1.95 to win the Malaysian GP, Vettel is 2.60 and Red Bull driver Daniel Ricciardo is 15.00 to pick up what would be a second race win of the season after coming in second in Singapore.